J-10 Thread III (Closed to posting)

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johnqh

Junior Member
As I mentioned in my first post, go take a look at Flankers carrying R27s under their intake, missiles protruding a little in front of the intake is not an issue.

Your mention of heat and fumes for the rear missiles also plainly ignores real world examples like M2Ks and Rafales carrying missiles in pretty much the same position with no problems.

It just looks like you are grasping at straws here.

Making a miscalculation about the lengths and drawing the wrong conclusions is perfectly natural and nothing to be ashamed of, but changing your argument and stubbornly refusing to re-examine your position in light of the new information just looks silly and makes me feel you just got an axe to grind instead of really caring about the subject.

The lack of basic knowledge you are displaying is also pretty disappointing. Only the J11Bs use Chinese radars, the original Su27s and first J11s used Russian radars, which were later upgraded to add R77 compatibility, amongst other things.

First, don't be so defensive.

Second, did you notice how big R-27 is and how far the rack extend from the body? Two things. The further the missile is from the body, the less aerodynamic impact. second, you also have to consider the turbulence on the missile itself. A smaller and lighter missile is more delicate.

With Rafale, the missiles are also extended from the body. Also, pay attention to the missiles it carries - MICA, 3.1m vs PL-12 at 4m. Pay attention to Rafale's design. Rafale is about one meter shorter than J-10. Note how much less space the main landing gears occupies. If you take additional 1.5m space away between the front and rear missiles, do you think it will be able to carry four MICA's underbody, even though MICA is almost the same length as PL-8?

Last, let's use some logic. The CAC designers are not stupid. If there is any way for them to fit the PL-12's under the body, there is no way they would try to implement combo racks for the wing points. Those two hard points are the only ones for heavy and long anti-ground or anti-ship weapons if it has to carry the external tanks. That's simple logic.

Regarding J-11/Su-27, I was thinking about J-11B. Because obviously J-11 can carry R-77 because J-11A is Su-27. That's deductive logic. If you can find Su-27 with R-77, then you can deduct J-11 can carry R-77.

However, if you cannot find photos of Chinese J-11 (or Su-27) with R-77, then you cannot say for sure that China has a R-77 inventory. The rumors of contract is supporting evidence for inductive logic, but nobody can say 100% for sure based on rumors.

With underbody hard points on J-10, there is no evidence, photos or others, to support missiles on those hard points. I can even use the appearance of combo wing racks as evidence against your speculation.

In any case, relax. Read my posts a couple of posts up. Don't take any kind of discussion personal. Don't be so defensive. It is bad enough to fight the T-50 and LCA fanboys. Don't be a fanboy yourself.
 

Hendrik_2000

Lieutenant General
By the way, it is unlikely that j10 carries r77. No country give out protocols to control their missiles (only known exceptions are magic and aim9, short range a2a). So the Chinese su27 cannot fire sd10/pl12, and j11 cannot fire r77.

Except China has cracked the fire control source code on SU 27 The news was all over the newspaper couple years back
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Chinese Engineer Cracks Russian Su-27 Fighter Production Codes
A 33-year old Chinese software engineer, Zhu Rong Gong, has duplicated the secret fire-control software and systems integration for Russia’s Su-27 series of aircraft, giving his country’s drive towards the fully autonomous production of this potent weapon a sharp spurt.

Zhu, who works at China’s Luoyang Institute of Electro-Optical Equipment (AVIC Research Institute Number 613), has won many awards, including a personal commendation from Defense Minister General Chi Haotian.

Zhu Rong Gong’s duplication feat, has contributed significantly towards China mass-producing its own updated and improved versions of the Su-27 fighter aircraft design, free of dependence on Moscow.


In February 1996, Russia sold full Su-27 production rights to China for US$2.5 billion, but withheld the production secrets of certain key technologies, such as the software used to control the aircraft’s sophisticated integrated fire control system, which were supplied only in “black box” form.

Initially, China completed its first domestic production of SU-27s, which the Chinese air force designates J-11, in late 1998, from imported components. By the end of this year, its output is expected to reach ten aircraft and then rise to 15 annually. The Chinese estimate eventual domestic production going up to 100 per year, although Western estimates put this total at no more than 10 to 20 aircraft per year with substantial Russian assistance.

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johnqh

Junior Member
couple years? its more like 9 years ago (2002)

Not really. It got reversed engined. However, that doesn't mean there is any plan to use the reversed code to add features. It was at most a backup plan if the home-grown code doesn't work well.

It's like you can reverse engineer Microsoft Word, but I have never seen (and don't expect to see) anyone making a "improved" Word based on the cracked code.
 

johnqh

Junior Member
Chinese Engineer Cracks Russian Su-27 Fighter Production Codes
A 33-year old Chinese software engineer, Zhu Rong Gong, has duplicated the secret fire-control software and systems integration for Russia’s Su-27 series of aircraft, giving his country’s drive towards the fully autonomous production of this potent weapon a sharp spurt.

Zhu, who works at China’s Luoyang Institute of Electro-Optical Equipment (AVIC Research Institute Number 613), has won many awards, including a personal commendation from Defense Minister General Chi Haotian.

Zhu Rong Gong’s duplication feat, has contributed significantly towards China mass-producing its own updated and improved versions of the Su-27 fighter aircraft design, free of dependence on Moscow.

Why quote from English sources?

I read the original Chinese version. It was a Baguwen. It was a reverse engineering job. However, there is no indication that the code will be improved upon to integrate other weapons.

And with the home-grown solution, there is no point to use the reversed code. The only weapon system China can use from Su-27 is R-27, which is outdated comparing to PL-12. BTW, those missiles have expiration date!

Processors get faster too. China uses much better standard protocols than Russia, and any software engineer will tell you that it is much easier to implement a complete system from ground up, instead of modifying a system which is completely foreign and undocumented.

So, I will give you some predictions. When the original Su-27 and J-11 get upgraded, the complete avionics will be replaced by home-grown systems, same as J-11B. This will be done in blocks, when R-27 inventory gets evaluated and tested. Eventually, when all R-27's are taken out of commission, all the Chinese Su-27 will be upgraded to J-11B.
 
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kyanges

Junior Member
Not really. It got reversed engined. However, that doesn't mean there is any plan to use the reversed code to add features. It was at most a backup plan if the home-grown code doesn't work well.

Well, application is another issue. Kroko's right, though, the news was from 2002, not a couple years ago.
 

kyanges

Junior Member
Gotcha.

What's the difference you're looking at?

I'm thinking of reverse engineering as being the total deconstruction of whatever you're reverse engineering. Can't really do that if you don't "crack" it too. In this case, "crack" the source code.
 
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i.e.

Senior Member
They prob need some reference to model their digitized version of Su-27SK control law that goes into J-11B.
sukhoi is very reluctant to supply them. so they asked their guy to crack it for them.
 

plawolf

Lieutenant General
First, don't be so defensive.

This is becoming so very typical of your posts. Utterly baseless accusations.

All I have done is use facts and logic to debunk your arguments. That is not 'defensive' by any stretch of the imagination.

The only one being defensive here is you, with your stubborn insistence to maintain a position despite all the back up your have presented in support of that position being systematically proven to be wrong or unconvincing at best.

Stop projecting and just discuss the topic.

Second, did you notice how big R-27 is and how far the rack extend from the body? Two things. The further the missile is from the body, the less aerodynamic impact. second, you also have to consider the turbulence on the missile itself. A smaller and lighter missile is more delicate.

That is just plain nonsense. The Su27 intake rack is little different from the underwing ones. And small missiles being 'delicate'?! Where the hell did you pull thaty one from? :rolleyes:

With Rafale, the missiles are also extended from the body. Also, pay attention to the missiles it carries - MICA, 3.1m vs PL-12 at 4m.

You are moving onto the missiles now? Try a scattergun approach much? :rolleyes:

And once again you are displaying your shockingly poor knowledge. The MICA is shorter than the PL12, but has a considerably shorter range as a result.

Again, its a design compromise not a superior solution. When will you ever learn?

Pay attention to Rafale's design. Rafale is about one meter shorter than J-10. Note how much less space the main landing gears occupies. If you take additional 1.5m space away between the front and rear missiles, do you think it will be able to carry four MICA's underbody, even though MICA is almost the same length as PL-8?

For someone who tells others to 'pay attenion' so much, you sure as hell don't do it much yourself.

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Looking at that picture, does the Rafale landing bay doors look like they take much less room than the J10's? Notice how your precious Rafale also retract its main gear into the fuselage instead of the wings. Guess the French don't know how to design landing gears either going by your logic. :rolleyes:

If you look at the room available either side of the Rafale, you can see that it looks to be a lot less, not more, than what the J10 has available in front of the MLG. The Rafale does have more room behind as a consequence.

Last, let's use some logic. The CAC designers are not stupid. If there is any way for them to fit the PL-12's under the body, there is no way they would try to implement combo racks for the wing points.

What kind of ridiculous BS nonsense logic is this? Combo racks and fuselage missile carriage capability are not mutually exclusive. It boggles the mind how anyone could make such a nonsensical claim.

Go look up pictures of F15s and F18s with combo racks and fuselage carriage of AMRAAMs.

Those two hard points are the only ones for heavy and long anti-ground or anti-ship weapons if it has to carry the external tanks. That's simple logic.

And? Those hardpoints are not aways going to be used to carry heavy weapons. On AA missions, why wouldn't they want the option of using dual racks?

Regarding J-11/Su-27, I was thinking about J-11B. Because obviously J-11 can carry R-77 because J-11A is Su-27. That's deductive logic. If you can find Su-27 with R-77, then you can deduct J-11 can carry R-77.

However, if you cannot find photos of Chinese J-11 (or Su-27) with R-77, then you cannot say for sure that China has a R-77 inventory. The rumors of contract is supporting evidence for inductive logic, but nobody can say 100% for sure based on rumors.

This is absolutely hilarious!

I used the J11 R77 as an example of where your 'if I ain't see a picture of it it doesn't exist' warped logic would utterly fail, and you then gone and actually made the point for me. And even gone as far as to try and cast doubt on whether China has any R77s at all? :rolleyes:

The PLAAF has a large R77 inventory. That is established fact, and has been for about a decade.

The Russians upgraded the Su27s and first J11s to allow them to use R77. That again is a reported fact, not rumor.

The fact you would even suggest otherwise not only aptly demonstrates how unsound your position is, but it also cast major doubts over whether you actually know what you are talking about since you seem to be ignorant of of many well established facts.

With underbody hard points on J-10, there is no evidence, photos or others, to support missiles on those hard points. I can even use the appearance of combo wing racks as evidence against your speculation.

There isn't confirmation yet, if there was we wouldn't be having this discussion. My point is that there is enough room on either side of the MLG to carrying AAMs on the J10.

In any case, relax. Read my posts a couple of posts up. Don't take any kind of discussion personal. Don't be so defensive. It is bad enough to fight the T-50 and LCA fanboys. Don't be a fanboy yourself.

The only one who is behaving like a fanboy is you, with your utter disregard for facts and real world examples.

All I have done is point out where you are wrong. Don't be pissy with me just because you don't like facts or reality.
 
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